highaltitude.log.20080123

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[07:20] <edmoore> hi natrium - you've probably seen, but you're on hackaday - congrats!
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[08:39] <Quai> :)
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[10:56] <Laurenceb> hi all
[10:56] <Laurenceb> new people on here :P
[10:57] <Laurenceb> I see zeusbot has been fixed :D
[10:57] Action: Laurenceb has a usb digital ssb reciever
[11:01] <Laurenceb> natrium42: what are you up to there days?
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[11:13] <Quai> hm, are there any software modems for aprs/tcn packets for linux?
[11:14] <Laurenceb> I've been working on fldigi
[11:15] <Laurenceb> problem is, theres only binaries for 32 bin systems
[11:15] <Laurenceb> and I'm running ubuntu 7.10 on amd64
[11:15] <Laurenceb> so it had to be cross compiled
[11:16] <Laurenceb> and the waterfall display is now inverted, which is annoying
[11:16] <Quai> yeah, im running 64bit too
[11:17] <Laurenceb> in hindsight I shouldnt have installed 64bit lol
[11:17] <Laurenceb> I could email you the binary if you want (I think... I'm not that compitant with linux)
[11:19] <Laurenceb> yes, I've just taken a look, and it will work if you just have the binary
[11:19] <Laurenceb> where are you?
[11:19] <Laurenceb> UK?
[11:21] <Laurenceb> http://www.w1hkj.com/Fldigi.html
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[12:16] <Quai> Laurenceb: sorry, I had to run. Some servers that needed some attention :P
[12:16] <Quai> Im in norway btw
[12:17] <Quai> ah, gutsy has fldigi in apt :D
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[13:14] <willo> huh! :)
[13:15] <willo> --- Log closed Sun Mar 19 00:03:09 2006
[13:15] <willo> --- Log opened Wed Jan 23 14:14:43 2008
[13:15] <willo> it's been a while :-D
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[13:23] <Quai> :P
[13:23] <edmoore> hi quaj
[13:23] <edmoore> quai*
[13:24] <Quai> hey
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[13:44] <Insane> Heh
[13:44] <Insane> High altitude ballooning is interesting
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[14:07] <Laurenceb> Quai: dont go near the apt fldigi
[14:07] <Laurenceb> its an old beta version
[14:08] <Insane> Am I the only person who spends his time downloading a 50 MB highaltitude sonar image?
[14:08] <Laurenceb> lol
[14:08] <Laurenceb> what of/
[14:08] <Insane> Great wall of china
[14:09] <Laurenceb> cool
[14:09] <Insane> heh. 47%
[14:10] <Insane> and I'm donwloading Ubuntu from local servers at 120 KB/s
[14:10] <Laurenceb> sonar?
[14:11] <Laurenceb> so is it of the foundations or something?
[14:11] <Insane> Sorta
[14:12] <Insane> Actually it's just since visual imagry isn't visible from such altitudes
[14:12] <Laurenceb> do you mean radar?
[14:12] <Insane> Erm, right
[14:12] <Insane> I realized I typed it just now
[14:12] <Insane> lol
[14:12] <Laurenceb> lol ok
[14:12] <Insane> :P
[14:12] Action: Insane smacks his keyboard again
[14:12] <Insane> I'm still waiting for brain interfacing
[14:13] <Laurenceb> I'm waiting for a flu cure
[14:14] <Insane> I'm waiting for world peace
[14:14] <Insane> Which will probably come some time after WW 3
[14:14] <Laurenceb> lol
[14:14] <Insane> = everything but one country go boom
[14:15] <Laurenceb> apparently there is a big russian exercise in the bay of biscay today
[14:16] <Insane> Is there?
[14:25] <Laurenceb> I read in the paper
[14:25] <Laurenceb> not that bbc news cares
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[14:25] <Laurenceb> they are more interested in http://news.bbc.co.uk/1/hi/england/bradford/7204543.stm
[14:35] <prpplague> anyone familiar with the HALO project posted on hackaday.com today?
[14:36] <prpplague> http://www.natrium42.com/halo/flight2/#hardware1
[14:46] <Laurenceb> that would be natrium42 :P
[14:49] <prpplague> ahh didn't notice the nick
[14:50] <Laurenceb> so thats why theres all the extra visitors :P
[14:50] <prpplague> probably
[14:51] Action: prpplague is mainly interested in the hardware used
[14:51] <Laurenceb> natriums payload was excessive imo
[14:51] <Laurenceb> you can get much simpler
[14:52] <prpplague> yea my main question was with a 600mhz arm, why he needed the additional atmega
[14:52] <Laurenceb> I'm presently constructing a high altitude aerosol sampler
[14:52] <Laurenceb> I've got a 300mhz avr32 on my present system
[14:53] <prpplague> Laurenceb: running a dedicate app or os?
[14:53] <Laurenceb> linux :D
[14:53] <prpplague> Laurenceb: you get a third party dev board with the avr32 on it? or did you do your own pcb?
[14:53] <Laurenceb> then I've cross compiled python
[14:54] <Laurenceb> I've got the ngw100 board
[14:54] Action: prpplague googles
[14:54] <prpplague> ahh interesting board
[14:55] <prpplague> Laurenceb: how much did that cost you?
[14:55] <Laurenceb> £39
[14:55] <prpplague> 39 quid? nice
[14:57] <Laurenceb> yes, I've got a daughterboard with an atmega168
[14:57] <Laurenceb> and opamps ect
[14:57] <Laurenceb> its bolted on the top
[14:58] <Laurenceb> my radio boards arrived today, and we've got a usb reciever
[14:58] <Laurenceb> used batchpcb for the radio
[14:59] <Laurenceb> we also have a yagi antenna and tripod
[15:00] Action: Laurenceb is working for http://www.atm.ox.ac.uk/
[15:00] Action: prpplague looks
[15:00] <prpplague> ahh interesting
[15:03] <prpplague> Laurenceb: the company i work for does small single board computer designs, when i saw natrium42's project, i thought there might be some interest in a carrier board with some of these features intergrated
[15:03] <Laurenceb> I see
[15:03] <Laurenceb> maybe, but there are really only a few people doing this sort of thing
[15:04] <prpplague> indeed
[15:05] <prpplague> Laurenceb: http://www.elinux.org/Hammer_Board
[15:05] <Laurenceb> where do work?
[15:06] <prpplague> Laurenceb: i'm sorry?
[15:06] <Laurenceb> nice
[15:06] <Laurenceb> very samll, and almost as powerful as the ngw100
[15:07] <Laurenceb> I was just wondering where you work?
[15:07] <prpplague> Laurenceb: ahh
[15:07] <prpplague> Laurenceb: TinCanTools.com and amltd.com
[15:07] <prpplague> Laurenceb: sister companies
[15:07] <prpplague> Laurenceb: i mainly do handheld designs
[15:09] <Laurenceb> ah cool
[15:13] <Laurenceb> some nice stuff
[15:14] <Laurenceb> wonder if I could run python on that :P
[15:14] <Laurenceb> someone got doom running on an avr32, with a vga lcd
[15:15] <prpplague> Laurenceb: yea we already have python running on it
[15:15] <prpplague> Laurenceb: we also have several other languages including squeak(for the robotics folks)
[15:16] <Laurenceb> nice stuff
[15:17] <Laurenceb> I'm quite unfamiliar with linux
[15:17] <Laurenceb> been learning a lot recently
[15:17] <prpplague> ahh
[15:20] <Laurenceb> have you seen the wiki?
[15:21] <prpplague> yea, browsing it now
[15:21] <Laurenceb> I've been working a lot on gliders
[15:24] <Laurenceb> but I need more spare time
[15:25] <prpplague> don't we all
[15:25] <Laurenceb> I might have some photos to upload in a bit
[15:26] <Laurenceb> just finished the last cockroft walton multiplier
[15:27] <Laurenceb> this payload has 2KV and 5KV rails :P
[15:27] <prpplague> wow
[15:28] <Laurenceb> for ionsiers and electrostatic precipitators
[15:28] <prpplague> interesting
[15:30] <Laurenceb> its an aerosol collection mission
[15:38] <Insane> Yay back
[15:39] <Insane> 100% of GWC radar imagry at 2500x2900
[15:39] <Insane> 99% of Ubunutu
[15:39] <Insane> *Ubuntu
[15:40] <Laurenceb> lol
[15:42] <Laurenceb> right thats all the cables complete
[15:42] <Insane> Meep
[15:42] <Insane> glider?
[15:43] <Laurenceb> no, its an aerosol collection
[15:43] <Laurenceb> payload
[15:43] <Insane> Ooh ok
[15:43] <Insane> meep ubuntu done downloading
[15:44] <Insane> It got paused some time back, I only just realized. Unpaused and done in 10 seconds
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[16:06] <Laurenceb> http://wiki.ukhas.org.uk/projects:aerosol
[16:06] Action: prpplague looks
[16:07] <Laurenceb> maybe I should resize the photos
[16:09] <Laurenceb> there
[16:11] <Laurenceb> ok, theres some brief explanations
[16:17] <Laurenceb> what do you guys thing?
[16:24] <Insane> interesting
[16:24] <Laurenceb> I'm just powering it up
[16:24] <Laurenceb> indicator leds work
[16:25] <Insane> gj
[16:25] <Laurenceb> and no smoke
[16:25] <Insane> :P
[16:25] <Insane> that's a good thing I guess
[16:25] <Laurenceb> right, i'm going to dismantle it and fix the radio cable onto the ngw100
[16:26] <Insane> ngw100?
[16:26] <Laurenceb> that green pcb on the bottom
[16:26] <Laurenceb> its a linux single board computer
[16:26] <Insane> god bless linux
[16:27] <Laurenceb> I forgot to plug in the cable to the radio modem
[16:44] <Laurenceb> I've just got a new usb-rs232 adaptor :P
[16:45] <Insane> :P
[16:45] <prpplague> Laurenceb: jsut out curiousity, why not send off for a proto pcb instead "white wire" proto it?
[16:45] <Laurenceb> it would take too long
[16:46] <prpplague> Laurenceb: what do you consider "too long" ?
[16:46] <Laurenceb> more than a week
[16:46] <Laurenceb> this has to be ready in 6weeks
[16:46] <prpplague> Laurenceb: two layer pcb's usually can be done over night,
[16:47] <prpplague> Laurenceb: but i understand your concern
[16:47] <Laurenceb> the approach here is generally to prototype things like this and then go for a pcb when it works
[16:47] <prpplague> Laurenceb: yea
[16:47] <Laurenceb> theres a lot of concerns about interference
[16:47] <Laurenceb> in all probability the design will need a few tweaks
[16:48] <Laurenceb> right, time to power it up fully
[16:48] <Laurenceb> fingers crossed
[16:48] <prpplague> Laurenceb: yea, we usually do quick and dirty pcb's , lots of locations for fixes on tweaks on the pcb
[16:48] <prpplague> Laurenceb: good luck
[16:49] <Laurenceb> linux is firing up
[16:49] <Laurenceb> board power led is on
[16:50] <Laurenceb> I have a terminal :D
[16:51] <prpplague> any smoke yet?
[16:51] <Laurenceb> 150ma @9V
[16:53] <Laurenceb> lovely
[16:53] <Laurenceb> its very impressive
[16:53] <prpplague> good deal
[16:53] <Insane> heh
[16:53] <Laurenceb> I've got python talking to the gps
[16:53] <Laurenceb> with pyserial
[16:53] <prpplague> Laurenceb: time to call it a day and head to the pub, hehe
[16:53] <Insane> Oooooh
[17:03] <Laurenceb> right I'm off
[17:03] <Laurenceb> cya all
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[17:54] <Hiena> Good evening!
[17:56] <natrium42> hi
[18:00] <Hiena> natrium42, congratulation for the Flight 2. Very nice pictures.
[18:01] Nick change: Hiena -> Hiena_food
[18:01] <natrium42> thanks :)
[18:02] <prpplague> natrium42: indeed very nice
[18:02] <natrium42> it was a while ago, not sure why hackaday decided to post about it now
[18:02] <natrium42> :P
[18:02] <prpplague> natrium42: mind if i ask why you chose the gumstix board? it doesn't seem you are using the full power of the board with the posted info
[18:03] <natrium42> yah, good question
[18:03] <natrium42> the reason is that i used usb host functionality on flight 1
[18:03] <natrium42> to capture pictures from camera via usb
[18:03] <natrium42> and at request from ground, scale them down and downlink
[18:04] <prpplague> natrium42: ahh
[18:04] <natrium42> but on flight 2, i changed the system around
[18:04] <natrium42> so that it would just press camera buttons
[18:04] <prpplague> natrium42: so rev2 you were using less computing power by not doing the usb camera control
[18:04] <natrium42> this permitted taking video as well, but downlink was no longer possible
[18:05] <natrium42> computer power was sufficient
[18:05] <natrium42> the problems was that something failed on flight 1 early on and the cam stopped taking pictures
[18:05] <natrium42> maybe a poor USB connector, not sure
[18:05] <natrium42> this camera is also prone to crashing on USB comms...
[18:06] <natrium42> so i decided to simplify for flight2 and get the pictures
[18:06] <natrium42> but left the gumstix in for lazyness :)
[18:06] <prpplague> natrium42: other question is why the atmega to do the controls? why not run them directly from the vertex board?
[18:06] <natrium42> (it was also doing gps logging...)
[18:07] <natrium42> it was just easier that way, imo
[18:07] <natrium42> servos, adc cutoffs
[18:07] <natrium42> the pressure sensor was 5V, for example
[18:07] <natrium42> analog
[18:08] <natrium42> and the relays needed more current than gumstix can deliver
[18:08] <natrium42> so it was just easier to slap on an atmega :)
[18:08] <prpplague> natrium42: ahh
[18:09] <natrium42> i could have added gps logging to atmega too and gotten rid of gumstix
[18:09] <natrium42> didn't have time for that
[18:09] <prpplague> natrium42: maybe in your next flight package you can look at using the hammer board
[18:10] <natrium42> hmm
[18:10] <prpplague> natrium42: doing the temperature, and pressure sensor would be easy for the hammer, as well as the servo control
[18:10] <natrium42> it has usb host? nice
[18:11] <prpplague> yea
[18:11] <prpplague> natrium42: actually the second usb interface can be used as either usb host or usb device
[18:11] <natrium42> oh, ok
[18:12] <natrium42> what sucks about gumstix is the tight pitch connector
[18:12] <prpplague> natrium42: if you decide to revamp you flight package let me know, i'll see about getting you a freebie eval kit
[18:12] <prpplague> natrium42: indeed
[18:12] <prpplague> natrium42: hammer is .1" centers, standard 40-pin dip
[18:14] <natrium42> cool, thanks for your offer
[18:14] <prpplague> danders@amltd.com
[18:14] <natrium42> i am planning to do a glider mission in the summer
[18:14] <natrium42> need to fix comms to be persistent, though
[18:16] <prpplague> sounds interesting
[18:22] Nick change: Hiena_food -> Hiena
[18:25] <Hiena> How about the live video feed? I played with some VHF video modulator with an about 5W linear booster. It has a decent output and would be enough with a directional antenna pair.
[18:27] <natrium42> what would the LOS range be?
[18:33] <Hiena> Dunno, at the ground level it worked on 8km range with a simple sorthened antenna and a 3 element Yagi. I guess it could be at least 20 km with a 24 element amplified Yagi at the side and a full lenght dipole on the transmission side. The most HAM TV DX-ers operating 20-60W transmitters, and usually makes a 400-1000 km connections.
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[18:35] <Hiena> But i'm just talking from the bottom side of the budget.
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[21:15] <Arsanerit> This morning, I handed in a 104-page report on a project for a .5kg, .5L "CanSat" payload to fly on a stratospheric balloon near Kiruna, Esrange.
[21:15] <Arsanerit> Would anyone be interested in seeing the report?
[21:16] <Arsanerit> It's pretty nice and pretty comprehensive
[21:18] <Quai> \o Yes please :)
[21:18] <Arsanerit> http://www.topjaklont.org/studie/documents/milestone_3.pdf
[21:18] <Quai> how is the rules about unmanned ballons in sweeden btw?
[21:19] <Arsanerit> I don't know. It is not our responsibility.
[21:19] <Arsanerit> We provide only the payload. And it will change if we "win"
[21:19] <Arsanerit> If we "win", we will need the radio link of the balloon rather than our own (which is unusable), as well as the power source.
[21:19] <Arsanerit> The power source and the radio link will be provided by the balloon rather than the current tiny radio module and the current battery.
[21:20] <Arsanerit> In the first and second progress-report, our group was the best of 7 so there is a good chance we will fly.
[21:20] <Quai> ah. :) Im trying to figure out what I should do to do a legal launch here in norway
[21:20] <Arsanerit> But the balloon will fly anyway, so we don't know the rules. Ask BEXUS.
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[22:05] <Hiena> Time to sleep. Good night all!
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[00:00] --- Thu Jan 24 2008